| Firefly vs Fahkumram | 33–42 | 44.00% |
| Firefly vs Hwoarang | 16–21 | 43.24% |
| Firefly vs Jin | 12–24 | 33.33% |
| Firefly vs Kazuya | 14–22 | 38.89% |
| Firefly vs Steve | 16–18 | 47.06% |
| Firefly vs Dragunov | 10–24 | 29.41% |
| Firefly vs King | 11–21 | 34.38% |
| Firefly vs Reina | 17–15 | 53.12% |
| Firefly vs Law | 8–22 | 26.67% |
| Firefly vs Xiaoyu | 12–17 | 41.38% |
| Firefly vs Lili | 7–21 | 25.00% |
| Firefly vs Azucena | 11–15 | 42.31% |
| Firefly vs Clive | 12–14 | 46.15% |
| Firefly vs Heihachi | 8–17 | 32.00% |
| Firefly vs Bryan | 11–12 | 47.83% |
| Firefly vs Yoshimitsu | 8–12 | 40.00% |
| Firefly vs Eddy | 4–16 | 20.00% |
| Firefly vs Asuka | 8–11 | 42.11% |
| Firefly vs Lee | 8–10 | 44.44% |
| Firefly vs Victor | 9–7 | 56.25% |
| Firefly vs Paul | 4–10 | 28.57% |
| Firefly vs Jun | 3–11 | 21.43% |
| Firefly vs Feng | 3–10 | 23.08% |
| Firefly vs Lars | 6–7 | 46.15% |
| Firefly vs Lidia | 5–7–1 | 41.67% |
| Firefly vs Anna | 4–8 | 33.33% |
| Firefly vs Leroy | 5–5 | 50.00% |
| Firefly vs Raven | 3–7 | 30.00% |
| Firefly vs Leo | 6–2 | 75.00% |
| Firefly vs Miary Zo | 4–4 | 50.00% |
| Firefly vs Jack-8 | 4–2 | 66.67% |
| Firefly vs Nina | 2–3 | 40.00% |
| Firefly vs Zafina | 3–2 | 60.00% |
| Firefly vs Devil Jin | 2–2 | 50.00% |
| Firefly vs Alisa | 1–3 | 25.00% |
| Firefly vs Claudio | 1–2 | 33.33% |
| Firefly vs Shaheen | 0–3 | 0.00% |
| Firefly vs Armor King | 0–3 | 0.00% |
| Firefly vs Kuma | 1–1 | 50.00% |
Limitations
This data is often requested to give insight into which characters you have more trouble with than others, but it is not particularly helpful for that. The main issue is that it is heavily skewed by how strong the opponents you play are.
For example, this data suggests my worst matchup is clearly vs Reina, but that's just because most of those games are vs Yagami.
There is a way to account for this being worked on. The central idea is to assign each matchup a rating vs you which adjusts based on the result, much like the regular rating but also based on the rating of each player. With this, it would give a better summary of how well you perform vs each character.
In the meantime, this page is here to present the data as requested.